Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Interaction of Gaussian beam with near-spherical particle: an analytic–numerical approach for assessing scattering and stresses

Not Accessible

Your library or personal account may give you access

Abstract

We derive a straightforward theoretical method to determine the electromagnetic fields for the incidence of a monochromatic laser beam on a near-spherical dielectric particle. The beam-shape coefficients are obtained from the radial laser fields and expressed as a finite series in a form that has, to our knowledge, not been published before. Our perturbation approach to solve Maxwell’s equations in spherical coordinates employs two alternative techniques to match the boundary conditions: an analytic approach for small particles with low eccentricity and an adapted point-matching method for larger spheroids with higher aspect ratios. We present results for the internal and external fields, scattering intensities, and stresses exerted on the particle. While similarly accurate as others, our approach is easily implemented numerically and thus particularly useful in praxis, e.g., for analyzing optical traps, such as the optical stretcher.

© 2009 Optical Society of America

Full Article  |  PDF Article
More Like This
Comparison of stresses on homogeneous spheroids in the optical stretcher computed with geometrical optics and generalized Lorenz–Mie theory

Lars Boyde, Andrew Ekpenyong, Graeme Whyte, and Jochen Guck
Appl. Opt. 51(33) 7934-7944 (2012)

Scattering of a spheroidal particle illuminated by a Gaussian beam

Yiping Han and Zhensen Wu
Appl. Opt. 40(15) 2501-2509 (2001)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (50)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved